Patent US4191536A successfully refreshed from Google Patents.
US4191536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel compositions for reducing combustion chamber deposits and hydrocarbon emissions of internal combustion engines
Assignee: Ethyl Corp
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Filing: 1978-07-24
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Granted: 1980-03-04
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Expires: 1998-07-24
Abstract
Abstract Exhaust hydrocarbon emissions and combustion chamber deposits of an internal combustion engine being operated on gasoline containing a cyclopentadienyl manganese antiknock are reduced by the addition of a saturated cyclic ether, such as tetrahydrofuran.
Inventors
- 👤 Leonard M. Niebylski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:43
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/02; C10L1/00; C10L1/10; C10L1/14; C10L10/04; C10L10/10; C10L1/18; C10L1/185; C10L1/1852; C10L1/1855; C10L1/30; C10L1/305
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
70 words
As a composition of matter, a gasoline for a spark ignited internal combustion engine comprising a mixture of (i) hydrocarbons boiling within the gasoline range, (ii) a cyclopentadienyl manganese tricarbonyl antiknock compound wherein said cyclopentadienyl is a hydrocarbon group having from 5 to 17 carbon atoms in an amount sufficient to improve the antiknock characteristics of said gasoline, and (iii) an exhaust emission and engine deposit reducing amount of tetrahydrofuran.
Claim 2
Dependent Claim
70 words
As a composition of matter, a gasoline for a spark ignited internal combustion engine comprising a mixture of (i) hydrocarbons boiling within the gasoline range, (ii) a cyclopentadienyl manganese tricarbonyl antiknock compound wherein said cyclopentadienyl is a hydrocarbon group having from 5 to 17 carbon atoms in an amount sufficient to improve the antiknock characteristics of said gasoline, and (iii) an exhaust emission and engine deposit reducing amount of tetrahydrofuran.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein said cyclopentadienyl is methylcyclopentadienyl.
Claim 4
Dependent Claim
21 words
The composition of claim 2 containing from about 0.005 to about 10.0 grams of manganese per gallon as methylcyclopentadienyl manganese tricarbonyl.
Claim 5
Dependent Claim
23 words
The composition of claim 3 containing from about 0.05 to about 6.0 grams of manganese per gallon of gasoline as methycyclopentadienyl manganese tricarbonyl.
Claim 6
Dependent Claim
23 words
The composition of claim 4 containing from about 0.05 to about 0.125 grams of manganese per gallon of gasoline as methylcyclopentadienyl manganese tricarbonyl.
Claim 7
Dependent Claim
19 words
The composition of claim 1 containing from about 15.0 to about 100.0 grams per gallon of gasoline of tetrahydrofuran.
Claim 8
Dependent Claim
20 words
The composition of claim 6 containing from about 15.0 to about 60.0 grams per gallon of gasoline of said tetrahydrofuran.
Claim 9
Independent Claim
83 words
A method for reducing engine deposits and exhaust emissions from a spark ignited internal combustion engine that operated on a gasoline comprising (i) a mixture of hydrocarbons within the gasoline boiling range and (ii) a cyclopentadienyl manganese tricarbonyl antiknock compound wherein said cyclopentadienyl is a hydrocarbon group having from 5 to 17 carbon atoms in an amount sufficient to improve the antiknock characteristics of said gasoline which method comprises adding to said gasoline an exhaust emission and engine deposit reducing amount of tetrahydrofuran.
Claim 10
Independent Claim
83 words
A method for reducing engine deposits and exhaust emissions from a spark ignited internal combustion engine that operated on a gasoline comprising (i) a mixture of hydrocarbons within the gasoline boiling range and (ii) a cyclopentadienyl manganese tricarbonyl antiknock compound wherein said cyclopentadienyl is a hydrocarbon group having from 5 to 17 carbon atoms in an amount sufficient to improve the antiknock characteristics of said gasoline which method comprises adding to said gasoline an exhaust emission and engine deposit reducing amount of tetrahydrofuran.
Claim 11
Dependent Claim
11 words
The method of claim 8 wherein said cyclopentadienyl group is methylcyclopentadienyl.
Claim 12
Dependent Claim
30 words
The method of claim 9 wherein the amount of said methycyclopentadienyl manganese tricarbonyl is sufficient to provide from about 0.005 to about 10 grams of manganese per gallon of gasoline.
Claim 13
Dependent Claim
30 words
The method of claim 10 wherein the amount of said methylcyclopentadienyl manganese tricarbonyl is sufficient to provide from about 0.05 to about 6.0 grams of manganese per gallon of gasoline.
Claim 14
Dependent Claim
30 words
The method of claim 11 wherein the amount of said methylcyclopentadienyl manganese tricarbonyl is sufficient to provide from about 0.05 to about 0.125 grams of manganese per gallon of gasoline.
Claim 15
Dependent Claim
29 words
The method of claim 8 wherein said engine deposit and exhaust emission reducing amount of said tetrahydrofuran is from about 15.0 to about 100.0 grams per gallon of gasoline.
Claim 16
Dependent Claim
29 words
The method of claim 13 wherein said engine deposit and exhaust emission reducing amount of said tetrahydrofuran is from about 15.0 to about 60.0 grams per gallon of gasoline.
Claim 17
Independent Claim
116 words
A method of operating a spark ignited combustion engine using a gasoline containing an organomanganese antiknock which results in the reduction of exhaust emissions and engine deposits, said method comprising (a) supplying to the fuel induction system of said engine a gasoline containing an antiknock amount of a cyclopentadienyl manganese tricarbonyl antiknock wherein said cyclopentadienyl is a hydrocarbon group having from 5 to 17 carbon atoms and a gasoline soluble solution of a saturated cyclic ether such as tetrahydrofuran, (b) mixing said gasoline with air, (c) inducting the mixture into the combustion chamber of said engine, (d) compressing said mixture, (e) igniting said compressed mixture, and (f) exhausting the resultant combustion products through said combustion chambers.
Claim 18
Independent Claim
116 words
A method of operating a spark ignited combustion engine using a gasoline containing an organomanganese antiknock which results in the reduction of exhaust emissions and engine deposits, said method comprising (a) supplying to the fuel induction system of said engine a gasoline containing an antiknock amount of a cyclopentadienyl manganese tricarbonyl antiknock wherein said cyclopentadienyl is a hydrocarbon group having from 5 to 17 carbon atoms and a gasoline soluble solution of a saturated cyclic ether such as tetrahydrofuran, (b) mixing said gasoline with air, (c) inducting the mixture into the combustion chamber of said engine, (d) compressing said mixture, (e) igniting said compressed mixture, and (f) exhausting the resultant combustion products through said combustion chambers.
Claim 19
Dependent Claim
9 words
The method of claim 15 wherein cyclopentadienyl is methylcyclopentadienyl.
Claim 20
Dependent Claim
30 words
The method of claim 16 wherein the amount of said methylcyclopentadienyl manganese tricarbonyl is sufficient to provide from about 0.005 to about 10 grams of manganese per gallon of gasoline.
Claim 21
Dependent Claim
30 words
The method of claim 17 wherein the amount of said methylcyclopentadienyl manganese tricarbonyl is sufficient to provide from about 0.05 to about 6.0 grams of manganese per gallon of gasoline.
Claim 22
Dependent Claim
30 words
The method of claim 18 wherein the amount of said methylcyclopentadienyl manganese tricarbonyl is sufficient to provide from about 0.05 to about 0.125 grams of manganese per gallon of gasoline.
Claim 23
Dependent Claim
29 words
The method of claim 15 wherein said engine deposit and exhaust emission reducing amount of said tetrahydrofuran is from about 15.0 to about 100.0 grams per gallon of gasoline.
Claim 24
Dependent Claim
29 words
The method of claim 20 wherein said engine deposit and exhaust emission reducing amount of said tetrahydrofuran is from about 15.0 to about 60.0 grams per gallon of gasoline.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |